PercentSevenC

Will an S4 UIM bolt to the stock GSL-SE LIM? If not, what prevents it?

trochoid

iTrader: (6)

Not directly, bolt pattern, runners are different. I recall reading somewhere the swap is possible, but probably includes the LIM also.

PercentSevenC

Thanks, that's what I wanted to know.

Jeff20B

iTrader: (13)

What are you planning?

Hyper4mance2k

iTrader: (40)

Hopefully not an efi setup, but if you do go that route you can mod the S4 LIM to fit the SE block. Then you could mod a S5 UIM to fit the S4 LIM. Put it on and then hook up the VDI.

PercentSevenC

It was just a thought I had. Racing Beat's pre-'86 sidedraft LIMs are compatible with the GSL-SE LIM, and it looked like FC UIMs use a similar bolt pattern. It would be an easy way to go EFI; I'd just have to add some bungs for the primary injectors. But sounds like I'd need to either make an adapter plate or find a GSL-SE setup if I wanted to do that.

What prompted this thinking was when I realized that getting my Weber tuned probably isn't going to cost a whole lot less than a MegaSquirt by the time all is said and done.

Hyper4mance2k

iTrader: (40)

no its not. buy all the biggest jets and solder them closed and drill them until they work.

Jeff20B

iTrader: (13)

I think he's talking about needing smaller venturis/chokes for going turbo, and finally realizing that EFI is a better setup in the end.

Percent, have you also figured out that your heavily streetported engine perhaps isn't the best for boost? I say leave it NA and build a turbo engine for the truck.

I have all those parts to play with now. Maybe we should rework the plan to take advantage of them.

74RX4

iTrader: (10)

Thank John64

https://www.rx7club.com/1st-gen-archive-71/intake-s4-manafold-swap-complete-750214/